How do you factor #a^2 - 15a +56#? Algebra Polynomials and Factoring Factorization of Quadratic Expressions 1 Answer George C. May 20, 2015 #a^2-15a+56 = (a-7)(a-8)# To find this, notice that #15 = 7 + 8# and #56 = 7 xx 8#. Answer link Related questions How do you factor trinomials? What is factorization of quadratic expressions? How do you factor quadratic equations with a coefficient? What are some examples of factoring quadratic expressions? How do you check that you factored a quadratic correctly? How do you factor #x^2+16x+48#? How do you factor #x^2-9x+20#? Question #3fdac How do you factor #8+z^6#? There is no GCF to be factor out, so is there another method to complete this? How do you factor #2t^2+7t+3#? See all questions in Factorization of Quadratic Expressions Impact of this question 2825 views around the world You can reuse this answer Creative Commons License